An AC Power Standard for Loss Measurement Systems for Testing Power Transformers

Mohns, E.; Rather, P.; Badura, Henrik

doi:10.1109/tim.2017.2698678

Cited by 10 publications

(4 citation statements)

References 8 publications

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“…This behavior is reflected in the stability of the generated apparent and active power. Nevertheless, this source provides sufficiently stable calibration conditions for TLMS calibrations, as the typical time window for one test point is roughly 30 s. Several measurements based on 20 single readings within a time window of 25 s confirmed that the typical standard deviation is below 2 ppm for voltage and current, and below 3 ppm for active, reactive, and apparent power [11].…”

Section: B Ptb Reference Setup For Tlms System Calibrationmentioning

confidence: 91%

“…These calibration signals are applied to both the TLMS under test and to the measurement part of the reference setup. Presently, two slightly different approaches are used for generation of the calibration signals [6]- [11]: either the voltage and current are generated in parallel or the current is generated via a feedback system that locks the current in amplitude and phase to the applied voltage. In both cases, the voltage and current channels are separated (phantom power technique), so that no true power is dissipated.…”

Section: Tlms Calibration Setupsmentioning

confidence: 99%

“…Germany, have developed reference setups with complementary approaches for the system calibration of TLMS [10], [11], in order to support the European power transformer manufacturer industry in meeting the Ecodesign requirements via readily available TLMS system calibration services with sufficiently high accuracy. After a description of the respective VSL and PTB reference setups, this paper gives the approach and results of a full comparison of these two setups.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Reference Setups for Calibrating Power Transformer Loss Measurement Systems

Rietveld

Mohns

Houtzager

et al. 2019

IEEE Trans. Instrum. Meas.

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A unique comparison has been performed of two reference setups for the calibration of industrial power transformer loss measurement systems (TLMSs). The setups are developed by the Van Swinden Laboratorium (VSL), Delft, The Netherlands and Physikalisch-Technische Bundesanstalt (PTB), Brunswick, Germany, with the aim to calibrate industrial TLMS as a complete system, rather than just via its individual components, with an uncertainty better than 50 µW/VA, for voltages up to 100 kV, currents up to 2 kA, and power factors down to 0. The results of the comparison show excellent agreement of the PTB and VSL reference setups, both for the individual components as for the complete system. The phase agreement in the VSL and PTB component calibration results is better than (2 ± 5), (5 ± 12), and (10 ± 15) µrad for all calibration points in current ratio, voltage ratio, and power, respectively. In the full system comparison, the difference in the results of the VSL and PTB systems is less than 12 µW/VA for currents up to 1000 A and voltages up to 70 kV, with a −7 µW/VA difference averaged over all comparison measurements. This is well within the present 25 µW/VA measurement uncertainty of each of the VSL and PTB reference setups.

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Section: B Ptb Reference Setup For Tlms System Calibrationmentioning

confidence: 91%

Section: Tlms Calibration Setupsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparison of Reference Setups for Calibrating Power Transformer Loss Measurement Systems

Rietveld

Mohns

Houtzager

et al. 2019

IEEE Trans. Instrum. Meas.

Self Cite

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“…Methodologies designed to increase the knowledge about power grid components are therefore more and more required. For example, in [12], an ac power standard, for high voltages and high currents, permitting the correction of the systematic errors of the components is presented. Several procedures have been presented for the estimation of the line parameters both in transmission and in distribution grids [1], [13]- [17], but none of these considers the impact of the entire measurement chain also addressing systematic error estimation, which is intended for compensation purposes, and voltage regulation uncertainty estimation.…”

Section: Introductionmentioning

confidence: 99%

PMU-Based Estimation of Systematic Measurement Errors, Line Parameters, and Tap Changer Ratios in Three-Phase Power Systems

Pegoraro

Sitzia

Solinas

et al. 2022

IEEE Trans. Instrum. Meas.

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The availability of accurate data is fundamental for several monitoring and control applications of modern power grids. Nevertheless, the knowledge of critical data such as transmission line and transformer parameters is often affected by uncertainty. This can lead to important problems in the correct management of the power systems. In spite of a monitoring infrastructure that is being renewed thanks to new generation devices providing synchronized measurements, the actual values of line parameters and tap changer ratios are still affected by uncertainty sources that need to be properly considered. The behaviour of all the elements involved in the measurement chain must be duly modelled. This paper proposes an improved method to carry out the simultaneous estimation of line parameters, tap changer ratios, and systematic measurement errors for a three-phase power system. The proposed method is based on the suitable modelling of the measurement chain and on three-phase constraint equations (voltage drop and current balance) of all the components involved. Its effectiveness is confirmed by tests performed on a IEEE 14 bus test system reproduced as a threephase system under different operative conditions.

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An Improved Mobile Calibration Standard for Transformer Loss Measurement Systems

Cayer

Ayhan

Kefeli

2018

2018 Conference on Precision Electromagnetic Measurements (CPEM 2018)

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An AC Power Standard for Loss Measurement Systems for Testing Power Transformers

Cited by 10 publications

References 8 publications

Comparison of Reference Setups for Calibrating Power Transformer Loss Measurement Systems

Comparison of Reference Setups for Calibrating Power Transformer Loss Measurement Systems

PMU-Based Estimation of Systematic Measurement Errors, Line Parameters, and Tap Changer Ratios in Three-Phase Power Systems

An Improved Mobile Calibration Standard for Transformer Loss Measurement Systems

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